Once a close confidante to the ruling family of Dubai, the former United Arab Emirates' ambassador to London got his start negotiating lucrative trade deals as head of Dubai Customs. Has since invested his fortune in manufacturing and real estate around the world: owns a glass-bottling company in Dubai, London's Park Tower Hotel, a private bank in the Cayman Islands and nearly 18,000 acres of land in Perthshire, Scotland where his Highland Spring company bottles mineral water. Press-shy mogul received unwanted media attention last year when his son reportedly blocked pedestrian access to his Scottish lowlands estate, violating the country's "right to ramble" law.